On Wednesday 30 August 2006 19:13, Jeremy Fitzhardinge wrote:
> Andi Kleen wrote:
> > I tried that once on x86-64, but it wasn't possible because the linker
> > is missing the right relocations. It has something on the first look similar
> > for __thread data in user space, but it wasn't usable for the kernel.
> >
> The other difficulty is that you can't take the addresses of things in
> the pda and pass them around, which happens a lot.
The user space __thread works around this by always storing the address at
offset 0. Kernel does it similar, except it's not at offset 0.
> (Hm, it would be interesting to see if we could possibly use the code
> generated by gcc for TLS variables...)
I tried once on 64bit and it wasn't possible for various reasons.
-Andi
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